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H. WELLINGTON.

VACUUM-LAMP. 4 v Patentgd April 24, 1877.

N-PETERS. PNOTOLITMOGRAPHER, WASHINGTON. n C.

, ence marked thereon.

HENRY WELLINGTONQOF BRooKLYmNEwYonK.

ltdPRCVEMENTYIN VACUUM LAMPS." 1

Specification forming part of Letters Patent N... isomer, dated April 24,1 s17; application filed W March13,1877..

To all whom it may concern: I L l of Brooklyn, in the county of Kings and State of New York, haveinvented certain new and useful Improvements in- Vacuum-Lamps, of which the following is afull, clear, andexact description, reference being had to the accompanying drawings, and to the letters of refer.-

.Figure 1 is an axial section of a lamp, showing the working parts of my improvement in detail; and Fig.2, an elevation of an ordinary stand-lamp, showing the side lights, 85c.

The object of my invention is to produce a lamp having a central oil-reservoir and side lights or burners, (one or more,) to which the oil may be fedalitomatically and continuously,

and which may be filled from the top without the necessity of withdrawing and inverting the pipes B B. As-the oil is burned awayand sinks below the opening L, air from the exterior flows in, finding its inlet near the top of the ornament K, or through a suitable. per-v forationtherein, and passes up through the pipe I, which opens near the top of the'oilreservoir, as shown. This affords-the requisite supply of air above the oil, in order that a sufficient quantity thereof may flow down from its reservoir until the opening L is again closed, when the exclusion of air prevents any further discharge. In this manner the side lights are automatically and continuously fed.

In order to till the reservoir A, the oil-discharge tube 12 must be closed, and this should be doneat the same time that the filling-orifice is opened. For this purpose the valve V, which is pressed to its seat by the spring s, is closed by the downward movement of the valve 12, at the same time that the passage is opened for the oil, which is poured into the cup G after the ornamental piece I) has been removed.

During thefilli'ng the air from the top of the reservoir finds a vent through the perforations a a,,bet'ween the two plates G and H, the plate G being smaller than the one H, and serving to conduct the oil into the openings cut in the" central pipe. The space between these two plates or cups G and H is sufficient not only to afford an escape for the air, as explained, lbutalso to permit any oil to drip over from the cup G into the plate H, in case any should be blown up from the reservoirduring the process of filling. a

I The valve 1) is forced downwardly through- .the medium of a cross-piece, g, which is oper-fl -ated upon by theinclinedfaces of the ,part 6.1 This cross-piece is movable within suitable;

jecting ledge shown upon the plug 0 and the .movableparts eE. To fill the lamp, the handpiece E is turned to the left, when the upper.

valveis forced away from its seat, and the lower valve V isclosed. The ornamental part D is then elevated 'to uncover the filling-orifice, and. the oil poured in. It (the oilyflnds its way into the reservoir through the ports m m, and 'When asufficient quantity has been introduced the hand-piece is reversed, when the spring S carries the upper valve to its seat,- and the springs elevates the lower valve, after which the flowis automatically regulated, as previously explained.

\ The spring S is contained within .the central tube, and surrounds a smaller interior tube, which is intended as a guide and support for the springs. to the lower portion of the upper valve-plate b, and when the upper valve is forced against its seat the lower one is held a trifle above its seat, so that the oil may flow down to the trap. Beneath the reservoir the oil and air pipes are located in close proximity, and are drilled through the solid portion shown, so as to economize space as much as possible, and bring them within the tubular ornamental piece, in

This latter spring is attached order to preserve the symmetrical appearance of the lamp.

I To prevent the oil from entering the lower extremity of the air-pipe I and becoming clogged therein, which it would otherwise be liable to do, on account of the small diameter of said pipe, I place thereon an enlarged bell, (shown at J which obviates any such disadvantages; and to prevent the oil from clogging up the air-passage as itis being poured into the reservoir, I place a small screw-threaded sec; tion, 11, within the central tube, and depend a movable collar, 0, from it. This, when the upper valve is unseated, will drop down below the mouth of the oil-tube, and thus serve as a conductor or conveyer of the oil below said mouth, affording a clear unobstructed passage for the air between it and the outer tube.

By making the central reservoir of glass, the height of the oil therein is always apparent, and thus one of the annoyances attending the use of the students lamp is obviated.

It is found that a ground joint will not effectually prevent the flow of oil, and therefore the style of valves shown has been adopted. They are movable vertically and entirely from their seats, and are preferably made of a compound of glue and glycerine, which is not. afl'ected by the oil, and which, by reason of its elastic nature, affords a perfectly tight joint with the valve-seat. They may be made ated, and not liable to get out of repair. It

affords all the advantages of any of the class of automatically-feeding lamps, with the additional important features of permitting at all times a knowledge of the quantity of material in the reservoir, and very much superior facilities for feeding. The glass reservoir is, moreover, admitted to be the best medium for containing the hydrocarbon oils, and preventing that disagreeable and disadvantageous sweating of oil common in the metallic lampbowls.

Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In combination with a central glass res ervoir, supplying oil to one or more lateral burners, the upper and lower valves, operated by springs, and adapted to govern the inlet and outlet ports, substantially in the manner and for the purposes explained.

2. In an automatically-regulated feeding= lamp, the combination of the upper and lower valves, adapted to govern the inlet and outlet ports, as specified, the same being simultaneous in their motion, and movable directly and bodily from their seats, as hereinbefore set forth.

3. The combination, with the valve mechanism in an automatically-feeding lamp, .of the hand-piece E, carrying the cam-faces e, and the cross-key g, movable within the central tube, for the purpose of operating the valve, substantially as shown and described.

4:. In an automatically-feeding lamp of the character herein specified, the air-pipe I, conduct-ing air from the vent L upwardly through the oil-tube, and thence to the top of the closed reservoir, substantially as set forth.

5. In combination with the central tube, slotted to receive and hold the cross-key, and to afford a passage for oil to the central reservoir, the cup G, located above the air-vents, for the purpose of directing the inflowing oil, in the manner shown and described.

6. In combination with the pipe conducting oil to the central reservoir from the filling-orifice, the movable collar 0, affording an airpassage between it and the outer tube, as and for the purposes explained.

7. In combination with a central glass reservoir, supplying oil to one or more lateral burners, a central pipe running therethrongh and sustaining above said reservoir mechanism, substantially such as described, for operating the valves within, and affording a chamber within which said valves and their closing-springs are located, substantially as shown and described.

8. In combination with the oil-inlet at the top of a reservoir in an automatically-feeding lamp, a vertically-adjustable valve, held to its seat by the spring S, and adapted to operate substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand in the presence of two witnesses.

HENRY WELLINGTON.

Witnesses:

O. R. SEARLE, Gno. T. GRAHAM. 

